Window lock



April 10, 1945.

A. KAUFMAN ETAL WINDOW LOCK Filed July 2, 1943 ABRAH NVENTORS KAUFMAN HARRY KORMAN Patented Apr. 10, 1945 v UNITED, STATES 237mm i WINDOW LOCK W Abraham Kaufman and HarryKorman, New York, Application July 2, 1943, Serial No. e-3,245

3Claims. (crew-251) ].51-

This invention relates to window locks.

An object of this invention is to provide a highly improved window lock of the character described which has parts interchangeable for size, and which is easy to assemble, and has no screw threaded openings other than the opening in a nut, thus reducing greatly the machining costs of the lock.

Another object of this invention is to provide a compact, strong and durable window lock of the character described which shall be relatively inexpensive to manufacture, easy to apply to a window, and which shall yet be practical and efficient to a high degree in use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts which will be exemplified in the construction hereinafter described, and of which the scope of application will be indicated in the following claims,

In the accompanying drawing, in which is shown one of the various possible illustrative embodiments of this invention,

Fig. 1 is an elevational, cross-sectional view of a window provided with a window lock embodying the invention;

Fig. 2 is'a cross-sectional view taken on line 2--2 of Fig. 1;

Fig. 3 is a cross-sectional view taken on line 3-3 of Fig. 1; and

Fig. 4 is an exploded perspective view of various parts of the window lock.

Referring now in detail to the drawing, l designates a window provided with a window lock H embodying the invention. The window Ill may be of the double-hung sash type, and comprises a frame |2 in which there is slidably mounted a lower window sash l3 and an upper window sash 14. The window lock II is attached to the top portion |3a of sash I3, and has means to engage a portion Ma, of the sash M.

The lock l comprises a member 20 which may be made of metal, die-pressed and stamped into the shape shown in the drawing. As illustrated in the drawing, member 20 comprises a pair of co-planar wings or ears 2|, each formed with an opening or aperture 22 to receive a fastening screw 23 screwed into the top of sash portion l3a. Extending from the ears 2| are upweirdly and forwardly inclined walls 24 forming an inverted V-shaped portion. The walls 24 are slitted along parallel, longitudinal lines. as at 25, forming therebetween a strap 26 which is pressed downwardly to form a V-shaped portion comprising downwardly and inwardly converging portions 21.

As shown in the drawing, a square nut 30 may be dropped onto strap '26 to rest between the portions 25a of walls 24 on opposite sides of the slits 25. The nut will thus be positioned with its sides at 45 to the horizontal and vertical, as illustrated in Fig. 3 of the drawing.

Screwed to the nut 30 is a screw threaded member 3| having a shank 32 engaging the threaded opening of said nut. The screw 3| has a looped handle 33 at one end of the shank 32. It will be noted that the shank 32 passes below the side portions 25a of member 20. The screw is thus prevented from moving upwardly off member 26.

At the forward end of screw 3| is a tip 35 on which is mounted a, cup-shaped member 36 which is'adapted to contact portion Ida of sash M. The outer end of tip 35 is riveted, as at 31, to hold the cup 36 on'said tip.

It will be noted that the size of the nut 30 and screw 3| may be varied as there is enough play beneath the strapportions 25a to accommodate various sized screws and nuts.

It will befurther noted that the nut 30 contacts the inner edges of strap portions 250. and is thus held against side movement although there is sufiicient clearance to accommodate nuts of various thicknesses.

Member 20 does not need to be formed with any screw threaded openings, and. the only screw threaded part is the nut and screw. In assembling the parts the nut is first dropped into the slot in member 20, the screw 3| is then screwed through the nut, and the cup 36 is then applied to the tip 35 which is riveted to hold the cup in place.

It will also be noted that the strap 26 substantially forms a square with the strap portions 25a, and that a, slot is formed in walls 24 to receive the square nut 30.

Th V-shaped strap portion 26 does not extend below the plane of the underside of the apertured ears, so that member 20 may rest on top of portion |3a of the sash l3.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment above set forth, it is to be understood that all matter strap part comprising downwardly and inwardly inclined portions, and providing a slot in the inverted V-shaped part of said member, a not within said slot and on said V-shaped strappart,

and a screw screwed through nut.

2. A window lock comprising a member made from a single piece of sheet metal, and having a the Opening in the pair of co-planar, spaced, apertured portions, and a pair of upwardly and inwardly inclined walls extending from said apertured portions, said upwardly and inwardly inclined walls forming an inverted V and being slitted at its apex by a pair of parallel slits, the metal between said slits being depressed to form a l-shaped strap, a nut on said V-shaped strap, and a screw screwed through said nut. v

3. A window lock comprising a member adapted to be attached to a window sash and formed with a pair of spaced slits, the portion of said member between said slits being depressed to form a slot, and a pair of parallel straps on opposite sides of said. slot, a nut non-rotatably received and substantially fitting within said slot, and a screw screwed to said nut and extending beneath said pair of straps and above said depressed portion. ABRAHAM KAUFMAN. HARRY KORMAN. 

